<template>
  <div>
      <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
  <el-breadcrumb-item :to="{ path: '/roles' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
  </el-breadcrumb>
  <!-- 卡片视图 -->
   <el-card >
       <!-- 添加角色按钮区域 -->
        <el-row>
            <el-col>
                <el-button type="primary" @click="addDialogVisible = true">
                    添加角色
                </el-button>
            </el-col>
        </el-row>

        <!-- 角色列表区域 -->
        <el-table :data="rolelist" border stripe>
            <!-- 展开列 -->
            <el-table-column 
        type="expand">
        <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                <!-- 渲染一级权限 -->
                <el-col :span="5"  >
                    <el-tag @close="removeRightById(scope.row,item1.id)" closable >
                        {{item1.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 渲染二级三级权限 -->
                <el-col :span="18">
                <el-row :class="[i2 ===0 ?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                    <el-col :span="6"> 
                         <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable >
                        {{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                    </el-col>
                    <el-col :span="18">
                        <el-tag @close="removeRightById(scope.row,item3.id)" closable v-for="(item3) in item2.children" :key="item3.id" type="warning"> 
                            {{item3.authName}}
                        </el-tag>
                    </el-col>
                </el-row>
                </el-col>
            </el-row>
        </template>
        </el-table-column>
           <!-- 索引列 -->
        <el-table-column         
        type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
         <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
         <el-table-column label="操作">
             <template slot-scope="scope">
                 <el-button @click="showEditDialog(scope.row.id)" size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                 <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id)">删除</el-button>
                 <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
             </template>
            </el-table-column>
        </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%"
  @close="setRightDialogClosed"
  >
  <!-- 树形权限列表 -->
  <el-tree node-key="id" default-expand-all :default-checked-keys="defKeys" show-checkbox :data="rightslist" :props="treeProps" ref="treeRef"  ></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>
<!-- 添加用户的对话框 -->
  <el-dialog
  title="添加用户"
  :visible.sync="addDialogVisible"
  width="40%"
  @close="addDialogClosed"
  >
  <!-- 内容主体区域 -->
  <el-form :model="addForm" :rules="editListRules" ref="addFormRef" label-width="70px" >
  <el-form-item label="角色名称" prop="name">
    <el-input v-model="addForm.roleName"></el-input>
  </el-form-item>
  <el-form-item label="角色描述" prop="desc">
    <el-input v-model="addForm.roleDesc"></el-input>
  </el-form-item>
  </el-form>
  <!-- 底部区域 -->
  <span slot="footer" class="dialog-footer">
    <el-button @click="addDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addUser">确 定</el-button>
  </span>
</el-dialog> 

<!-- 编辑的对话框 -->
<el-dialog
  title="修改用户"
  :visible.sync="editDialogVisible"
  width="50%"
  @close="editDialogClosed"
  >
     <el-form :model="editlist" ref="editListRef" :rules="editListRules" label-width="75px" >
        <el-form-item label="名称" prop="name">
          <el-input v-model="editlist.roleName" ></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="desc" >
          <el-input v-model="editlist.roleDesc" ></el-input>
        </el-form-item>
    </el-form>

  <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editUserInfo">确 定</el-button>
  </span>
</el-dialog>
  </div>
</template>

<script>
export default {
    data(){
        return{
            //添加角色的列表
            addForm:{
                roleName:'',
                roleDesc:''
            },
            //控制添加用户对话框的显示与隐藏
            addDialogVisible:false,
            //控制权限对话框的显示与隐藏
            setRightDialogVisible:false,
            //所有角色列表数据
            rolelist:[],
            //编辑角色的列表
            editlist:{},
            // 所有权限的数据
            rightslist:{},
            // 定义修改角色的验证规则
            editListRules:{
                name:[
                     {
                   required:false,message:'请输入角色名称',trigger:'blur'},
                ],
                desc:[
                     {
                   required:false,message:'请输入角色描述',trigger:'blur'},
                ]
            },
            //控制对话框开关
            editDialogVisible:false,
            // 树形控件的属性绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            //默认选中的id值节点的数组
            defKeys:[],
            // 当前即将分配权限角色的id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
       async getRolesList(){
          const {data:res} = await this.$http.get('roles')

          if(res.meta.status !== 200){
              return this.$message.error('获取角色列表失败')
          }
          this.rolelist = res.data
        },
        // 根据id查询角色
        async showEditDialog(id){
            const {data:res} = await this.$http.get('roles/'+id)
            if(res.meta.status !== 200){
          return this.$message.error('查询用户信息失败！')
        }
        this.editlist = res.data
        this.editDialogVisible = true
        },
        // 监听编辑用户的关闭事件
        editDialogClosed(){
            this.$refs.editListRef.resetFields()
        },
        //添加角色
        addUser(){
        this.$refs.addFormRef.validate( async valid=>{
          if(!valid)return
          //可以发起添加用户的请求
         const {data:res} = await this.$http.post('roles',this.addForm)
         if(res.meta.status !== 201){
           this.$message.error('添加用户失败!')
         }
         this.$message.success('添加用户成功!')
         //关闭表单框
         this.addDialogVisible = false
         //重新获取用户列表
         this.getRolesList()
        })
        },
        //监听对话框关闭事件
      addDialogClosed(){
          this.$refs.addFormRef.resetFields()
      },
        // 修改用户信息并且提交
        editUserInfo(){
            this.$refs.editListRef.validate( async valid=>{
               if(!valid) return
                //发起修改请求
           const {data:res} = await this.$http.put('roles/'+this.editlist.roleId,{
               roleName:this.editlist.roleName,
               roleDesc:this.editlist.roleDesc
           })
           if(res.meta.status !== 200){
               this.$message.error('修改用户失败!')
           }
        this.$message.success('修改用户成功!')
         //关闭表单框
         this.editDialogVisible = false
         //重新获取用户列表
         this.getRolesList()
            })
        },
        // 删除角色
      async removeUserById(id){
             //询问用户是否删除
       const confirmResult =  await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        //用户确定删除，返回值为confirm，取消删除则为cancel
        if(confirmResult !== 'confirm'){
          return this.$message.info('已取消删除')
        }
      const {data:res} = await this.$http.delete('roles/'+id)
      if(res.meta.status!==200){
        return this.$message.error('删除用户失败!')
      }
      this.$message.success('删除用户成功!')
      this.getRolesList()
        },
        // 根据id删除对应权限
       async removeRightById(role,id){
            //提示用户是否要删除
             const confirmResult =  await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        //用户确定删除，返回值为confirm，取消删除则为cancel
        if(confirmResult !== 'confirm'){
          return this.$message.info('已取消删除')
        }
      const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${id}`)
      if(res.meta.status!==200){
        return this.$message.error('删除用户失败!')
      }
      this.$message.success('删除用户成功!')
      role.children = res.data
        },
        //展示分配权限的对话框
       async showSetRightDialog(role){
         this.roleId = role.id
            //获取所有权限数据
           const {data:res} = await this.$http.get('rights/tree')
           if(res.meta.status!==200){
        return this.$message.error('获取权限失败!')
      }
      this.rightslist = res.data

      //递归获取三级节点的id
    //   this.defKeys = ''
      this.getLeafKeys(role,this.defKeys)
            this.setRightDialogVisible = true
        },
        //通过递归的形式获取角色下所有三级权限的id,保存到defKeys数组中
        getLeafKeys(node,arr){
            //如果当前节点不包含children属性,则是三级节点
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item=>{
                    this.getLeafKeys(item,arr)
            })
        },
            //监听权限对话框的关闭事件
        setRightDialogClosed(){
                this.defKeys = []
            },
            //点击为角色分配权限
        async allotRights(){
              const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()

              ]
              const idStr = keys.join(',')
             const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids: idStr})
             if(res.meta.status !== 200)
             return this.$message.error('分配权限失败')
             this.$message.success('分配权限成功!')
             this.getRolesList()
             this.setRightDialogVisible = false
            }
    }

}
</script>

<style lang='less'>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;
}
.bdbottom{
    border-bottom: 1px solid #eee;
}
.vcenter{
    display: flex;
    align-items: center;
    padding-left:50px;
}
</style>